19263496849 has 3 divisors (see below), whose sum is σ = 19263635643. Its totient is φ = 19263358056.

The previous prime is 19263496831. The next prime is 19263496859. The reversal of 19263496849 is 94869436291.

The square root of 19263496849 is 138793.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10694662225 + 8568834624 = 103415^2 + 92568^2 .

It is not a de Polignac number, because 19263496849 - 2¹⁷ = 19263365777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19263496829) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 69397 + ... + 208189.

It is an arithmetic number, because the mean of its divisors is an integer number (6421211881).

Almost surely, 2^19263496849 is an apocalyptic number.

19263496849 is the 138793-rd square number.

19263496849 is the 69397-th centered octagonal number.

It is an amenable number.

19263496849 is a deficient number, since it is larger than the sum of its proper divisors (138794).

19263496849 is an frugal number, since it uses more digits than its factorization.

19263496849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277586 (or 138793 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 61.

The spelling of 19263496849 in words is "nineteen billion, two hundred sixty-three million, four hundred ninety-six thousand, eight hundred forty-nine".